- (IBAction)Open:(id)sender {

    UIImagePickerController *picker = [[UIImagePickerController alloc] init];

    if([UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

        picker.sourceType = UIImagePickerControllerSourceTypeCamera;

        NSArray *temp_MediaTypes = [UIImagePickerControlleravailableMediaTypesForSourceType:picker.sourceType];

        picker.mediaTypes = temp_MediaTypes;

        picker.delegate = self;

        picker.allowsImageEditing = YES; 

    }

    [self presentModalViewController:picker animated:YES];

    [picker release];

}

2.拍照回调

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

     NSString *mediaType = [infoobjectForKey:UIImagePickerControllerMediaType];

     BOOL success;

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSError *error;

    NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    if ([mediaType isEqualToString:@"public.image"]){

        UIImage *image = [infoobjectForKey:@"UIImagePickerControllerEditedImage"];

        NSLog(@"found an image");

       NSString *imageFile = [documentsDirectorystringByAppendingPathComponent:@"temp.jpg"];

        NSLog(@"%@", imageFile);

        success = [fileManager fileExistsAtPath:imageFile];

        if(success) {

            success = [fileManager removeItemAtPath:imageFile error:&error];

        }

        imageView.image = image;

        [UIImageJPEGRepresentation(image, 1.0f) writeToFile:imageFileatomically:YES];

         //SETIMAGE(image);

        //CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);

    }

    else if([mediaType isEqualToString:@"public.movie"]){

        NSURL *videoURL = [infoobjectForKey:UIImagePickerControllerMediaURL];

        NSLog(@"%@", videoURL);

        NSLog(@"found a video");

        NSData *videoData = http://www.mamicode.com/[NSData dataWithContentsOfURL:videoURL];

        /****************************************/

        NSString *videoFile = [documentsDirectorystringByAppendingPathComponent:@"temp.mov"];

        NSLog(@"%@", videoFile);

        success = [fileManager fileExistsAtPath:videoFile];

        if(success) {

            success = [fileManager removeItemAtPath:videoFile error:&error];

        }

        [videoData writeToFile:videoFile atomically:YES];

        //CFShow([[NSFileManager defaultManager] directoryContentsAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);

        //NSLog(videoURL);

    }

    [picker dismissModalViewControllerAnimated:YES];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

       [picker dismissModalViewControllerAnimated:YES];

}